/Engine/Source/Runtime/Core/Public/Containers/Set.h
The base KeyFuncs type with some useful definitions for all KeyFuncs; meant to be derived from instead of used directly. bInAllowDuplicateKeys=true is slightly faster because it allows theTSetto skip validating that there isn't already a duplicate entry in theTSet.
template<typename ElementType, typename InKeyType, bool bInAllowDuplicateKeys> struct BaseKeyFuncs